A close-ring pair terahertz metamaterial resonating at normal incidence

被引：75

作者：

Gu, Jianqiang ^{[1
,2
,3
]}

Han, Jiaguang ^{[4
]}

Lu, Xinchao ^{[1
]}

Singh, Ranjan ^{[1
]}

Tian, Zhen ^{[1
,2
,3
]}

Xing, Qirong ^{[2
,3
]}

Zhang, Weili ^{[1
]}

机构：

[1] Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA

[2] Tianjin Univ, Minist Educ, Coll Precis Instrument & Optoelect Engn, Ctr Terahertz Waves, Tianjin 300072, Peoples R China

[3] Tianjin Univ, Minist Educ, Key Lab Optoelect Informat & Tech Sci, Tianjin 300072, Peoples R China

[4] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 22期

基金：

美国国家科学基金会;

关键词：

NEGATIVE-INDEX METAMATERIAL; FREQUENCIES; TRANSMISSION; ANTENNAS;

D O I：

10.1364/OE.17.020307

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a systematic study of a close-ring pair based freestanding metamaterial fabricated by double-layer, self-aligned photolithography. Terahertz time-domain spectroscopy transmission measurements and numerical simulations have revealed negative index of refraction in the frequency range of 0.66-0.90 THz under normal wave incidence. The observed resonance behaviors can be well explained by a theoretical circuit model. The electromagnetic properties and the figure of merit of such close-ring metamaterials are also explored in terms of geometrical parameters of the unit cell with a goal of providing optimized design for three-dimensional metamaterials and potential device applications. (C) 2009 Optical Society of America

引用

页码：20307 / 20312

页数：6

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